CN100509651C - Combined technique for garbage filter liquor treatment - Google Patents

Combined technique for garbage filter liquor treatment Download PDF

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Publication number
CN100509651C
CN100509651C CNB2006100618300A CN200610061830A CN100509651C CN 100509651 C CN100509651 C CN 100509651C CN B2006100618300 A CNB2006100618300 A CN B2006100618300A CN 200610061830 A CN200610061830 A CN 200610061830A CN 100509651 C CN100509651 C CN 100509651C
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treatment
combined technique
garbage
aerobic
filter liquor
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CN101113057A (en
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廖志民
吴吉军
居德金
郭景奎
黄玉和
蔡东升
李�荣
俞琨
万爱国
刘智忠
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Jiangxi JDL Environmental Protection Ltd
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Jiangxi JDL Environmental Protection Research Ltd
SHENZHEN JINDALAI ENVIRONMENTAL PROTECTION CO Ltd
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Abstract

A combination technique of garbage treatment for percolating liquid contains the process of facultative-aerobic biochemical treatment and anti-penetration treatment. The invention is characterized in that: the anti-penetration treatment is arranged before the facultative-aerobic biochemical treatment. The process can also contain deamination treatment which is arranged after the anti-penetration treatment. Compared with the prior arts, the invention of the combination technique of garbage treatment for percolating liquid sets the anti-penetration treatment before the biochemical treatment, which enables most of the pollution material in the percolating liquid to be trapped in advance, directly through the anti-penetration system and solves the problem of biodegradability of garbage percolating liquid changing with age and has small occupying space. The technique sets the deamination treatment after the anti-penetration treatment to achieve high ammonia-nitrogen removal rate: 90-95 percent and puts the facultative-aerobic biochemical technique thereafter, which can greatly reduce the occupying space. The invention relates to the garbage treatment for percolating liquid and has the advantages of technical reliability, economy and strong applicability.

Description

A kind of combined technique for garbage filter liquor treatment
Technical field
The present invention relates to a kind of process for treating waste liquor, relate in particular to a power kind combined technique for garbage filter liquor treatment.
Background technology
Percolate is the product of liquid in the landfill yard gravity flowage, is mainly derived from the interior moisture of precipitation and rubbish itself.Because liquid has many factors may have influence on the character of percolate in flow process, comprises physical factor, chemical factor and biotic factor etc., so the character of percolate changes in a sizable scope.In general, its pH value is between 4-9, and COD is in the scope of 2000-62000mg/L, and in addition BOD also contains heavy metal, salt and the multiple pathogeny microorganism of multiple high density from 60-45000mg/L.
The municipal wastes loading embeading percolation liquid is the high concentrated organic wastewater of complicated component in, and its composition and character changes with " age " of garbage loading embeading, mainly shows: (1) percolate complicated component; (2) BOD/COD can reach more than 0.5 the landfill initial stage, but along with the increase of landfill time, the organic concentration of the readily biodegradable in the garbage filter is very low, and biochemical is poor, the macromolecular substance of difficult degradation is preponderated, and causes the value of BOD/COD even can be lower than 0.1; (3) NH of high density 3-N is one of feature of percolate, causes low C/N ratio.
In China from the time, three phases has been experienced in the processing of percolate.Fs is the initial stage nineties, the traditional biochemical processing of the many employings of treatment process, technology is mainly with reference to the municipal sewage treatment method, representational case history has emperor mountain range, Hangzhou, Beijing A Suwei etc., because can not adapt to this complicated component of percolate, change of water quality is big, the treatment plant that this stage builds up is in paralyzed state substantially; Subordinate phase is the middle and later periods nineties, the technician considers the water quality uniqueness of percolate, as the ammonia nitrogen of high density, the organism of high density etc., taked the deamination measure, treatment process is generally deamination+anaerobic treatment+aerobic treatment, and representational case history has Shenzhen Xia Ping, Hong Kong New Territories west etc.Most of Ammonia blowing-out tower or electrolytic process of adopting aspect deamination, adopt the ammonia stripping to need secondary to adjust pH value, and can cause secondary pollution to air, cause working cost higher, also there is the high problem of expense in same electrolytic process, owing to Organic pollutants concentration height, follow-up biochemical treatment floor space is big in addition; Phase III is after 2000, and along with emission standard is more and more stricter, percolate only depends on biological treatment can't reach processing requirements, generally takes to carry out a biological disposal upon+method of advanced treatment.Representational case history has Xinfeng, Guangzhou, Chongqing Chang Shengqiao etc.As the employing of Xinfeng, Guangzhou percolate treatment plant is UASB (upflow anaerobic sludge blanket reactor)+SBR (sequencing batch active sludge)+ro treatment technology, yet this kind also has weak point: the one, and do not consider the high ammonia nitrogen characteristics of waste water and directly enter the UASB treatment system, can cause this system's operation undesired; The 2nd, because garbage filter BOD/COD ratio with refuse landfill " age " variation, arrives refuse landfill later stage BOD/COD even can should carry out the design of UASB, SBR by this value, thereby cause floor space excessive less than 0.1.The 3rd, ton water investment and processing cost are too high, and (treatment scale is 500m 3/ d, construction investment is about 6,000 ten thousand, the about 25 yuan/m of processing cost 3).
Summary of the invention
The technical problem to be solved in the present invention is, deficiency at above-mentioned prior art existence, a kind of combined technique for garbage filter liquor treatment is provided, this technology compares, screens, makes up, improves the relative merits of existing percolation treatment technology, thereby provides that a kind of technology is reliable, economically feasible and the strong garbage filter liquid processing method of suitability.
The technical solution used in the present invention is, a kind of combined technique for garbage filter liquor treatment comprises double oxygen+aerobic biochemical treatment step and reverse-osmosis treated step, it is characterized in that, before carrying out described double oxygen+aerobic biochemical treatment step, carry out described reverse-osmosis treated step.
Above-mentioned combined technique for garbage filter liquor treatment comprises the deamination treatment step, and described deamination treatment step carries out after the reverse-osmosis treated step.
Above-mentioned combined technique for garbage filter liquor treatment, described deamination treatment step carries out between described reverse-osmosis treated step and double oxygen+aerobic biochemical treatment step.
Above-mentioned combined technique for garbage filter liquor treatment is regulated treatment step and coagulating precipitation process step before described reverse-osmosis treated step, precipitate to efflux step behind the oxygen of holding concurrently+aerobic biochemical treatment step.
Above-mentioned combined technique for garbage filter liquor treatment, described reverse-osmosis treated step is divided into two portions, a part is the three-stage filtration system handles, another part is the reverse osmosis membrane filtration system handles, three grades of filter core apertures of described three-stage filtration system are adopted and are reduced step by step, in the grade one filter, adopt the wire-wound filter core of aperture between 10-30 μ m; In the secondary filter, adopt the active carbon filter core of aperture between 5~15 μ m,, enter tertiary filter again, adopt the melt-blown filter of aperture between 3~10 μ m by preceding cascade filtration; After finishing described three-stage filtration system handles, carry out the reverse osmosis membrane filtration system handles.
Above-mentioned combined technique for garbage filter liquor treatment, described deamination treatment step adopts and adds Mg salt and phosphoric acid salt, presses Mg 2+: PO 4 3-: NH 4 +The ratio of=1:1:1 adds.
Above-mentioned combined technique for garbage filter liquor treatment, described double oxygen+aerobic biochemical treatment step, using modified type oxygen compatibility pool of biochemical treatment and Aerobic Pond adopt filler to hang microbial film, and biomass is 10~15kg/m 3, the oxygen section dissolved oxygen concentration of holding concurrently is less than 0.5mg/l, and the aerobic section dissolved oxygen concentration is 1.0~3.0mg/l, and aeration mode is a micro-pore aeration.
Above-mentioned combined technique for garbage filter liquor treatment, aerobic treatment adopts contact oxidation method to handle, it is exactly dress extension filler in the modified form Aerobic Pond, the whole fillers of waste water submergence through aeration, and cross filler with certain velocity flow, make and cover with microbial film on the filler, under the active sludge effect of microbial film and a small amount of suspended state, waste water is purified.
Above-mentioned combined technique for garbage filter liquor treatment, described coagulating precipitation process step, be in coagulative precipitation tank, to dose an amount of flocculation agent PAC (polymerize aluminum chloride) and coagulant aids PAM (polyacrylamide), it is between the 0.05-0.5% that PAC doses weight ratio, and the weight ratio of PAC and PAM is 100:1-5; The PH of waste water is controlled between the 8.5-9.0.
Compared with prior art, combined technique for garbage filter liquor treatment of the present invention has following technique effect:
1, compares with the UASB+SBR+ ro treatment technology that Xinfeng, Guangzhou percolate treatment plant adopts, before ro treatment technology is prepended to biochemical treatment, can be directly hold back most pollution substances in the percolate in advance by reverse osmosis system, thereby can solve the problem that the percolate biodegradability changed with " age ", floor space is little simultaneously, and the disposal field floor space only is about 20% of a common biochemical processing process.
2, with conventional treatment process the position of deamination treatment step is compared, with deamination handle place the reverse-osmosis treated step after, gained filtrate generates MgNH by adding Mg salt and phosphoric acid salt 4PO 46H 2The composite fertilizer of O reaches 90-95% to ammonia-N removal rate.Because filtration treatment by the front reverse osmosis, material and part ammonia nitrogens such as the suspended substance of the removal waste water overwhelming majority, organism, principal pollutant are ammonia nitrogen in the filtrate at this moment, and other pollutents disturb ammonia nitrogen removal in the minimizing waste water, reduce Mg salt and phosphatic dosage.Improve the purity of composite fertilizer simultaneously, produce better economic benefit, efficiently solve the too high and secondary pollution problems of working cost that conventional ammonia stripping brings.
3, by the reverse-osmosis treated step is preposition, deamination treatment step postposition improves the ratio of BOD/COD in the waste water, stable raising wastewater biodegradability, the influence to follow-up biochemical system that has also solved ammonia nitrogen in high density greatly.
4, oxygen+aerobic (A/O) biochemical processing process postposition of will holding concurrently can reduce floor space greatly.Because processing by the front operation, finally enter double oxygen+aerobic (A/O) biochemical treatment system organic contamination substrate concentration and have only stoste about 1/10, with preposition the comparing of conventional treatment process mesophytization treatment step, during biochemical reaction of the present invention since the organic contamination substrate concentration reduce greatly, therefore greatly reduce floor space and the volume of handling structures, reduce construction investment.
Description of drawings
Fig. 1 is the processing technological flow sketch of percolate of the present invention.
Embodiment
With reference to accompanying drawing 1, a kind of combined technique for garbage filter liquor treatment, in landfill percolate is collected the inflow equalizing tank, boring aeration pipe is set in equalizing tank, fully aeration mixes, and strengthens regulatory function, prevents that suspended substance from precipitating in equalizing tank, even water quality, the water yield, the air capacity value is 5.0m when adopting perforated pipe aerating regulation to stir according to the design specifications equalizing tank 3/ (hm 3).
By submersible pump waste water is pumped into the coagulating settling tank, in coagulative precipitation tank, dose an amount of flocculation agent PAC and coagulant aids PAM, PAC doses weight ratio and is generally between the 0.05-0.5%, as can being 0.2% or 0.35%, the ratio of PAC and PAM weight is more suitable between the 100:1-5, as being 100:2 or 100:4; The PH of waste water is controlled between the 8.5-9.0, forms flco and precipitate at rectangular sedimentation tank, the settling tank surface load is 1m 3/ m 2About h, supernatant liquor enters intermediate pool again, pumps into reverse osmosis treatment system by pump, and reverse osmosis is divided into two portions: three-stage filtration system+reverse osmosis membrane filtration system, three grades of filter core apertures are adopted and are reduced step by step.In the grade one filter, adopt the wire-wound filter core of aperture between 10-30 μ m; In the secondary filter, adopt the active carbon filter core of aperture between 5~15 μ m,, enter tertiary filter again, adopt the melt-blown filter of aperture between 3~10 μ m by preceding cascade filtration.In strainers at different levels, be equipped with and shut down automatic cleaning system, improve filtration efficiency, guarantee filter effects at different levels in time to clean filter core automatically.Through after above-mentioned three grades of candle filter filtration treatment, the turbidity of percolate generally can be reduced to and equal less than 1NTU, sludge density index (SDI) SDI can drop to and equal less than 5, guarantee to enter reverse osmosis membrane filtration system primary condition, dense water is back to front end again, produce water and enter the deamination operation, adopt and add Mg salt and phosphoric acid salt, press Mg 2+: PO 4 3-: NH 4 +The ratio of=1:1:1 adds, and ammonia-N removal rate at 90-95%, is solved the problem of high ammonia nitrogen.
Ratio through the waste water BOD/COD after front coagulating sedimentation, reverse osmosis, the deamination processing improves greatly, and ratio can rise to more than 0.4.Waste water enters double oxygen+aerobic (A/O) biochemical treatment system, the biochemical treatment of A/O section is modified form oxygen compatibility pool and Aerobic Pond, adopt filler to hang microbial film, biophase concentration ratio conventional activated sludge process is abundant in the modified form oxygen compatibility pool, and biomass is also higher than conventional activated sludge process, and the biomass of conventional activated sludge process has only 2~4kg/m 3, and the biomass of modified form A/O method generally can reach 10~15kg/m 3, therefore, the A/O section can be born higher organic loading.A section dissolved oxygen concentration is less than 0.5mg/l, and O section dissolved oxygen concentration is about 2.0mg/l.A/O section aeration mode is a micro-pore aeration.
The first two stage, hydrolysis and the souring stage of facultative processing and utilizing anaerobic treatment.Hydrolysis stage is that the larger molecular organics with complexity is hydrolyzed to micromolecular dissolved organic matter by extracellular enzyme.Souring stage is that deliquescent organism is converted into organic acid, alcohol, aldehyde and CO 2Deng.
Aerobic treatment adopts contact oxidation method to handle, so-called contact oxidation method is exactly a dress extension filler in the modified form Aerobic Pond, the whole fillers of waste water submergence through aeration, and cross filler with certain velocity flow, make and cover with microbial film on the filler, under the active sludge effect of microbial film and a small amount of suspended state, waste water is purified.
By combined treatment process of the present invention, basically solve several difficult points of present treating refuse percolate: waste water complexity, biodegradability are poor, the characteristics of high ammonia nitrogen, pass through biochemical treatment system again, can stablize and reach the desired first discharge standard of GB16889-1997 " consumer waste filling and embedding pollution control criterion ", even can realize reuse.
The present embodiment combined technique for garbage filter liquor treatment can simply be described as:
Percolate → equalizing tank → coagulating settling tank → intermediate pool → reverse osmosis → deamination → oxygen+aerobic (A/O) → precipitation → standard discharge of holding concurrently.
Above-mentioned combined technique for garbage filter liquor treatment is collected percolate, squeezes into the coagulating settling tank by pump, under control pH value condition, adds flocculation agent and coagulant aids, removes the suspended substance and the heavy metal contaminants of the overwhelming majority in the waste water; Carry out filtration treatment through the reverse-osmosis treated device again, hold back the macromolecular substance (as phenyl ring class, anthraquinone class) of difficult degradation in the waste water, all be deliquescent small-molecule substance in the filtrate, can improve the ratio of BOD/COD in the waste water greatly, thereby improve the biodegradability of waste water by reverse osmosis; Filtrate enters the deamination section, adopts physicochemical method, under the condition of control pH value, adds the ammonia nitrogen in the chemical agent removal waste water; Waste water behind the deamination enters double oxygen+aerobic (A/O) biochemical treatment system, cultivate a large amount of double oxygen bacteriums in the oxygen compatibility pool, on filler, utilize hold concurrently hydrolysis of oxygen bacterium and acid production, larger molecular organics in the sewage is converted into the small organic molecule of easy degraded, insoluble organism becomes deliquescent organism, improves the biodegradability of waste water.Flow into Aerobic Pond then, be attached with a large amount of aerobic bacterias in the Aerobic Pond on the biologic packing material, under the aeration aerating condition, organism will fully be degraded in the waste water, and water outlet is through the precipitation qualified discharge.
The characteristics of present embodiment combined technique for garbage filter liquor treatment are as follows:
1, pre-treatment adopts the sedimentary simple materialization of equalizing tank+coagulating to handle, and is identical with common sewage disposal, simple to operation, reliable;
2,, directly hold back most pollution substances in the percolate by reverse osmosis system through the waste water behind the coagulating sedimentation.Reverse osmosis is a kind of advanced person's a membrane separation technique, it is a kind of physical filtering treatment process, substitute existing biochemical processing process with reverse osmosis process, what adopt with Xinfeng, Guangzhou percolate treatment plant simultaneously is that the UASB+SBR+ ro treatment technology is compared, with the preposition problem that can solve the percolate biodegradability with " age " variation of ro treatment technology, floor space is little simultaneously, and the disposal field floor space only is about 20% of a common biochemical processing process.
3, compare with the position that conventional treatment process is arranged the deamination section, with the deamination postposition, be arranged in the reverse osmosis back, gained filtrate generates MgNH by adding Mg salt and phosphoric acid salt 4PO 46H 2The composite fertilizer of O reaches 90-95% to ammonia-N removal rate.Because filtration treatment by the front reverse osmosis, material and part ammonia nitrogens such as the suspended substance of the removal waste water overwhelming majority, organism, principal pollutant are ammonia nitrogen in the filtrate at this moment, other pollutents disturb ammonia nitrogen removal in the minimizing waste water, reduce Mg salt and phosphatic dosage, improve the purity of composite fertilizer simultaneously, produce better economic benefit, efficiently solve the too high and secondary pollution problems of working cost that conventional ammonia stripping brings.
4, by ro treatment technology is preposition, deamination technology postposition improves the ratio of BOD/COD in the waste water, stable raising wastewater biodegradability, the influence to follow-up biochemical system that has also solved ammonia nitrogen in high density greatly.
5, oxygen+aerobic (A/O) biochemical processing process postposition of will holding concurrently can reduce floor space greatly.Because the processing by the front operation finally enters double oxygen+aerobic (A/O) biochemical treatment system organic contamination substrate concentration and has only stoste about 1/10.Compare at leading portion with conventional treatment process mesophytization treatment process,, therefore greatly reduce floor space and the volume of handling structures, reduce construction investment because the organic contamination substrate concentration reduces greatly.

Claims (10)

1, a kind of combined technique for garbage filter liquor treatment comprises double oxygen+aerobic biochemical treatment step and reverse-osmosis treated step, it is characterized in that, before carrying out described double oxygen+aerobic biochemical treatment step, carries out described reverse-osmosis treated step.
2, according to the described combined technique for garbage filter liquor treatment of claim 1, it is characterized in that, comprise the deamination treatment step, described deamination treatment step carries out after described reverse-osmosis treated step.
According to the described combined technique for garbage filter liquor treatment of claim 2, it is characterized in that 3, described deamination treatment step carries out between described reverse-osmosis treated step and double oxygen+aerobic biochemical treatment step.
4, according to claim 1,2 or 3 described combined technique for garbage filter liquor treatment, it is characterized in that, before described reverse-osmosis treated step, regulate treatment step and coagulating precipitation process step, behind the oxygen of holding concurrently+aerobic biochemical treatment step, precipitate and efflux step.
5, according to claim 1,2 or 3 described combined technique for garbage filter liquor treatment, it is characterized in that, described reverse-osmosis treated step is divided into two portions, a part is the three-stage filtration system handles, another part is the reverse osmosis membrane filtration system handles, three grades of filter core apertures of described three-stage filtration system are adopted and are reduced step by step, in the grade one filter, adopt the wire-wound filter core of aperture between 10-30 μ m; In the secondary filter, adopt the active carbon filter core of aperture between 5~15 μ m,, enter tertiary filter again, adopt the melt-blown filter of aperture between 3~10 μ m by preceding cascade filtration; After finishing described three-stage filtration system handles, carry out the reverse osmosis membrane filtration system handles.
According to claim 2 or 3 described combined technique for garbage filter liquor treatment, it is characterized in that 6, described deamination treatment step adopts and adds Mg salt and phosphoric acid salt, presses Mg 2+: PO 4 3-: NH 4 +The ratio of=1:1:1 adds.
7, according to claim 1,2 or 3 described combined technique for garbage filter liquor treatment, it is characterized in that, described double oxygen+aerobic biochemical treatment step, using modified type oxygen compatibility pool of biochemical treatment and Aerobic Pond adopt filler to hang microbial film, and biomass is 10~15kg/m 3, the oxygen section dissolved oxygen concentration of holding concurrently is less than 0.5mg/l, and the aerobic section dissolved oxygen concentration is 1.0~3.0mg/l, and aeration mode is a micro-pore aeration.
8, according to the described combined technique for garbage filter liquor treatment of claim 7, aerobic treatment adopts contact oxidation method to handle, it is exactly dress extension filler in the modified form Aerobic Pond, the whole fillers of waste water submergence through aeration, and cross filler with certain velocity flow, make and cover with microbial film on the filler, under the active sludge effect of microbial film and a small amount of suspended state, waste water is purified.
9, according to the described combined technique for garbage filter liquor treatment of claim 4, described coagulating precipitation process step, be to dose an amount of flocculation agent PAC and coagulant aids PAM in coagulative precipitation tank, it is between the 0.05-0.5% that PAC doses weight ratio, and the weight ratio of PAC and PAM is 100:1-5; The PH of waste water is controlled between the 8.5-9.0.
10, according to the described combined technique for garbage filter liquor treatment of claim 4, regulate treatment step, be that boring aeration pipe is set in equalizing tank, fully aeration mixes, and strengthens regulatory function, prevents that suspended substance from precipitating in equalizing tank, evenly water quality, the water yield.
CNB2006100618300A 2006-07-27 2006-07-27 Combined technique for garbage filter liquor treatment Active CN100509651C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101767890B (en) * 2010-01-13 2012-07-11 广西大学 Method applying membrane combining process to dispose garbage percolate
CN102219328A (en) * 2010-04-16 2011-10-19 中国科学院生态环境研究中心 Photoelectric integrated reactor capable of deeply treating garbage leachate
CN103130378B (en) * 2011-11-24 2014-03-26 马志文 System for treating household garbage leachate
CN103086539A (en) * 2013-01-21 2013-05-08 北京市环境保护科学研究院 Solid-liquid separating device and method of concentrated liquid waste from banknote printing wiping
CN108221947A (en) * 2017-12-28 2018-06-29 广州市第四建筑工程有限公司 Ultra-large type soot entirety drainage and construction method
CN109293046A (en) * 2018-10-12 2019-02-01 南京易洁环保科技有限公司 A kind of purifying domestic sewage method
CN110698002A (en) * 2019-11-22 2020-01-17 廖思凤 Treatment method of domestic garbage fermentation bin sewage

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